Every spring the Amazon dolphins get to leave the confines of their river channel for a taste of their former habitat.
每年春天，亚马逊河豚离开所属河道的范围，到从前的栖地去晃一晃。
Because the water pressure in spring assembly and valve body makes the conical compression core and seat seal automatically, the flow channel of valve is closed.
因弹簧总成和阀体中水流压力将锥形压芯和锥形压座自动压合密封，阀体水流通道关闭。
The vent valve comprises an air vent screw, a spring and a valve ball which leans against the channel under the acting force of the spring.
所述排气阀包括一排气螺钉、 一弹簧、一钢球，阀球在弹簧作用力下抵靠通道上。
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